p ponnay



(No Model.) 2 sheets-sheet m.

R. PONNAY. ROTARY STEAM MOTOR.

Patented Sept. 10, 1895 Richard Ponnay.

WITNESSES: INVENTUR.

ATTEIRNEY ANDREW lGRAHAM. Puo'romnuwAsm NGTONIIC (No Model.) 2Sheets-Sheet 2.

R. PONNAY.

ROTARY STEAM MOTOR.

No. 546,080. Patented Sept. 10, 1895.

Richard Ponnay,

WITNESSES: INVENTUR,

ATTEIRNEY.

a'rnivr FFlCE.

RICHARD PONNAY, OF PORTLAND, OREGON, ASSIGNOR OF ONE-HALF TO HORACE G.CAMPBELL, OF SAME PLACE.

ROTARY STEAM-MOTO R.

SPECIFICATION forming part of Letters Patent No. 546,080, datedSeptember 10, 1895.

Application filed July 3,1894. Serial as. 516.444. (N0 model.)

To all whom it may concern.-

Be it known that I, RICHARD PONNAY, a citizen of the United States,residing at Portland, (Glencoe Park Addition,) Multnomah county, Oregon,have invented a new and useful Improvement in Rotary Steam-Motors, ofwhich the following is a specification, reference being had to theaccompanying drawings, as forming a part hereof.

My invention relates to that class of rotary steam-motors which areoperated by a jet of steam thrown directly against the periphery of awheel for the purpose of obtaining power from the rotary motion impartedto the shaft of such wheel; and the object of my invention is to perfectthe contrivance heretofore used for this purpose.

In myinvention the wheel which is mounted on the revolving shaft isrotated by means of a jet of steam thrown directly against an endlessseries of radial paddles provided in such wheel, and the parts of myco-operating mechanism are so constructed, adapted, and combined as toutilize the effective energy of the steam.

It is further my intention to make my motor of light weight, so as to beeasily transportable, to avoid having wearing parts or parts requiringpacking or lubricating, except on the journals, and to obtain as large apercentage of power of driving force as is possible in proportion to theamount of steam used.

These advantages I obtain bythe use of the mechanism illustrated in thesaid accompanying drawings, the respective figures in which represent asfollows:

Figure 1 is a side elevation of my invention with parts broken away toshowinterior. Fig. 2 is an end view of the same. Fig. 3 is a transversevertical section. Fig. 4 is an enlarged detail of wheel partly brokenaway to show construction of steam or expansion chambers and of thesteam-tubes, one of the latter being shown in section. of one of thesteam-tubes, and Fig. 6 is a detail of the expansive chambers.

Referring to the figures designating the parts of my invention, thehousing 1 is provided with standards 2 for supporting the same.

Fig. 5 is a bottom View.

2 is an innercasing suitably supported within the housing.

3 is an annular steam-chamber tapped by the valve 4 admitting the steamfrom the boiler, and such steam-chamber 3 is provided with a series ofangular recesses 5 on the outer surface of the casing 2,in which thesteamtubes 6, which will be again referred to later, are inserted. Oneor both of the walls of the housing are removable, andthey are providedwith boxes for the journals of the wheel to revolve in. Mounted withinsaid casing is a wheel 1, which may consist of two plates 1, attached toa hub or collar 8 on the shaft, and in the rim of this wheel areprovided a series of boxes, which constitute an endless series ofpaddles 9, radiating from the wheels axis, as well as an endless seriesof steam or expansion chambers 10, in which the steam issuing from thesteam-tubes 6 is, for the instant, ejected and expands.

The steam-tubes 6 consist of pieces of tubing threaded at one end, whichends are screwed in the angular recesses 5 on the casing, such angularrecesses having threaded apertures, in which such pieces of tubing maybe inserted, the apertures in which no tubes are inserted being closedby plugs. (See Fig. 1.) 'In affixing the steam-tubes in said recesses 5they are so adjusted as to throw the steam emitted through them againstthe paddles in the periphery of the wheel at an acute angle of twenty orthirty degrees in the line of rotation, the average incline which hasgiven good results in practical experiments being about twenty-fivedegrees.

The apertures 11 at the extremity of the dis: charge ends of the tubes 6are made of sufficient size to emit a volume of steam of about one-tenththe dimension of the expansionchambers 10in the wheel. Above suchextremity 11 the tube is enlarged to four times this dimension, theobject of such construction of the steam-tubes 6 being to maintain thejet of steam delivered through them as nearly as possible atboiler-pressure, and at the same time the enlarged area of theexpansion-chambers 10, being, as stated, about ten times greater thanthe area of the discharge-apertures 11 of the steam-tubes, faciliber 10the chambers on either side thereof are for the instant covered. Chamber3 is divided into two compartments by two suitable steam-tightpartitions 12 and 12 at the lowest and highest points of the casing 2'.(See Fig. 1.) The upper partition is situated between thesteam-apertures 11 11, under valve 4, for the purposes hereinafterreferred to. One or more steamtubes may be provided for propelling thewheel in one direction and an equal number of steam-tubes for propellingthe wheel in an opposite direction, providing the same power isrequired, thus rendering my motor reversible by manipulating the valvecontrolling the admissionof steam into the tubes operating the motor inone direction or the other. The expansion-chambers 10 are steam-tightand of enlarged dimensions to allow the steam ejected therein to expand.After the wheel has attained certain speed the centrifugal forcedeveloped has a tendency to expel all steam that has been ejected intoas well as the air contained in the expansionchambers 10, and thus allowthe steam ejected from the steam-tubes free expansion.

13 is a suitable exhaust chamber.

Fig. 3.) s The power of my motor may be considerably increased by usinga condensing contrivance (See in connection with my invention-that is tosay, some means for producing more or less of a vacuum in the housing inwhich the wheel revolves.

The speed of my engine may be controlled by the use of any ordinarysteam-engine governor.

Having thus described my invention, I claim as follows:

The combination in a rotary steam motor of a removable housing mountedon standards, an annular steam chamber, between the outer housing andcylindrical casing 2, divided into two compartments, said casing beingsupported within the housing, angular recesses on the outer surface ofsaid casing, steam tubes secured in the angular recesses, passingthrough said casing and oppositely arranged therein with respect to thetwo compartments, reduced apertures in the inner ends of the tubes, ajournal mounted in boxes in the side walls of the housing,awheel mountedon the journal to revolve within said casing, a series of boxes formingan endless series of paddles on the periphery of the wheel, a steamvalve mounted on top the housing to admit steam into either compartment,an exhaust chamber at the bottom of the housing connected with the innerchamber, substantially as described and set forth.

In testimony whereof I have hereunto affixed my signature, in thepresence of two witnesses, this 24th day of May, 1894.

RICHARD PONNAY. Witnesses:

H. G. CAMPBELL, T. J. GEISLER.

